1 /* $OpenBSD: devopen.c,v 1.8 2003/06/02 23:27:44 millert Exp $ */ 2 /* $NetBSD: devopen.c,v 1.1 1995/11/23 02:39:37 cgd Exp $ */ 3 4 /*- 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Ralph Campbell. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)devopen.c 8.1 (Berkeley) 6/10/93 36 */ 37 38 #include <lib/libsa/stand.h> 39 40 /* 41 * Decode the string 'fname', open the device and return the remaining 42 * file name if any. 43 */ 44 devopen(f, fname, file) 45 struct open_file *f; 46 const char *fname; 47 char **file; /* out */ 48 { 49 register char *cp; 50 register char *ncp; 51 register struct devsw *dp; 52 register int c, i; 53 int ctlr = 0, unit = 0, part = 0; 54 char namebuf[20]; 55 int rc; 56 57 cp = (char *)fname; 58 ncp = namebuf; 59 60 /* look for a string like 'disk(0,0,0)bsd' */ 61 if (strchr(cp, '(')) { 62 while ((c = *cp) != '\0') { 63 if (c == '(') { 64 cp++; 65 break; 66 } 67 if (ncp < namebuf + sizeof(namebuf) - 1) 68 *ncp++ = c; 69 cp++; 70 } 71 72 /* get controller number */ 73 if ((c = *cp) >= '0' && c <= '9') { 74 ctlr = c - '0'; 75 c = *++cp; 76 } 77 78 if (c == ',') { 79 /* get SCSI device number */ 80 if ((c = *++cp) >= '0' && c <= '9') { 81 unit = c - '0'; 82 c = *++cp; 83 } 84 85 if (c == ',') { 86 /* get partition number */ 87 if ((c = *++cp) >= '0' && c <= '9') { 88 part = c - '0'; 89 c = *++cp; 90 } 91 } 92 } 93 if (c != ')') 94 goto defdev; 95 cp++; 96 *ncp = '\0'; 97 } else { 98 defdev: 99 /* No valid device specification */ 100 cp = (char *)fname; 101 ncp = namebuf; 102 dp = devsw; 103 ctlr = unit = part = 0; 104 goto fnd; 105 } 106 107 for (dp = devsw, i = 0; i < ndevs; dp++, i++) 108 if (dp->dv_name && strcmp(namebuf, dp->dv_name) == 0) 109 goto fnd; 110 printf("Unknown device '%s'\nKnown devices are:", namebuf); 111 for (dp = devsw, i = 0; i < ndevs; dp++, i++) 112 if (dp->dv_name) 113 printf(" %s", dp->dv_name); 114 printf("\n"); 115 return (ENXIO); 116 117 fnd: 118 rc = (dp->dv_open)(f, ctlr, unit, part); 119 if (rc) 120 return (rc); 121 122 f->f_dev = dp; 123 if (file && *cp != '\0') 124 *file = cp; 125 return (0); 126 } 127